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Diffstat (limited to 'source/blender/gpu/intern/gpu_matrix.c')
| -rw-r--r-- | source/blender/gpu/intern/gpu_matrix.c | 649 |
1 files changed, 649 insertions, 0 deletions
diff --git a/source/blender/gpu/intern/gpu_matrix.c b/source/blender/gpu/intern/gpu_matrix.c new file mode 100644 index 00000000000..b6214f2778b --- /dev/null +++ b/source/blender/gpu/intern/gpu_matrix.c @@ -0,0 +1,649 @@ +/* + * ***** BEGIN GPL LICENSE BLOCK ***** + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the ipmlied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * The Original Code is Copyright (C) 2012 Blender Foundation. + * All rights reserved. + * + * The Original Code is: all of this file. + * + * Contributor(s): Alexandr Kuznetsov, Jason Wilkins, Mike Erwin + * + * ***** END GPL LICENSE BLOCK ***** + */ + +/** \file source/blender/gpu/intern/gpu_matrix.c + * \ingroup gpu + */ + +#include "../../../intern/gawain/gawain/gwn_shader_interface.h" + +#define SUPPRESS_GENERIC_MATRIX_API +#define USE_GPU_PY_MATRIX_API /* only so values are declared */ +#include "GPU_matrix.h" +#undef USE_GPU_PY_MATRIX_API + +#include "BLI_math_matrix.h" +#include "BLI_math_rotation.h" +#include "BLI_math_vector.h" + + +#define DEBUG_MATRIX_BIND 0 + +#define MATRIX_STACK_DEPTH 32 + +typedef float Mat4[4][4]; +typedef float Mat3[3][3]; + +typedef struct MatrixStack { + Mat4 stack[MATRIX_STACK_DEPTH]; + unsigned int top; +} MatrixStack; + +typedef struct { + MatrixStack model_view_stack; + MatrixStack projection_stack; + + bool dirty; + + /* TODO: cache of derived matrices (Normal, MVP, inverse MVP, etc) + * generate as needed for shaders, invalidate when original matrices change + * + * TODO: separate Model from View transform? Batches/objects have model, + * camera/eye has view & projection + */ +} MatrixState; + +#define MATRIX_4X4_IDENTITY {{1.0f, 0.0f, 0.0f, 0.0f}, \ + {0.0f, 1.0f, 0.0f, 0.0f}, \ + {0.0f, 0.0f, 1.0f, 0.0f}, \ + {0.0f, 0.0f, 0.0f, 1.0f}} + +static MatrixState state = { + .model_view_stack = {{MATRIX_4X4_IDENTITY}, 0}, + .projection_stack = {{MATRIX_4X4_IDENTITY}, 0}, + .dirty = true +}; + +#undef MATRIX_4X4_IDENTITY + +#define ModelViewStack state.model_view_stack +#define ModelView ModelViewStack.stack[ModelViewStack.top] + +#define ProjectionStack state.projection_stack +#define Projection ProjectionStack.stack[ProjectionStack.top] + +void gpuMatrixReset(void) +{ + state.model_view_stack.top = 0; + state.projection_stack.top = 0; + unit_m4(ModelView); + unit_m4(Projection); + state.dirty = true; +} + +#ifdef WITH_GPU_SAFETY + +/* Check if matrix is numerically good */ +static void checkmat(cosnt float *m) +{ + const int n = 16; + for (int i = 0; i < n; i++) { +#if _MSC_VER + BLI_assert(_finite(m[i])); +#else + BLI_assert(!isinf(m[i])); +#endif + } +} + +#define CHECKMAT(m) checkmat((const float*)m) + +#else + +#define CHECKMAT(m) + +#endif + + +void gpuPushMatrix(void) +{ + BLI_assert(ModelViewStack.top + 1 < MATRIX_STACK_DEPTH); + ModelViewStack.top++; + copy_m4_m4(ModelView, ModelViewStack.stack[ModelViewStack.top - 1]); +} + +void gpuPopMatrix(void) +{ + BLI_assert(ModelViewStack.top > 0); + ModelViewStack.top--; + state.dirty = true; +} + +void gpuPushProjectionMatrix(void) +{ + BLI_assert(ProjectionStack.top + 1 < MATRIX_STACK_DEPTH); + ProjectionStack.top++; + copy_m4_m4(Projection, ProjectionStack.stack[ProjectionStack.top - 1]); +} + +void gpuPopProjectionMatrix(void) +{ + BLI_assert(ProjectionStack.top > 0); + ProjectionStack.top--; + state.dirty = true; +} + +void gpuLoadMatrix(const float m[4][4]) +{ + copy_m4_m4(ModelView, m); + CHECKMAT(ModelView3D); + state.dirty = true; +} + +void gpuLoadIdentityProjectionMatrix(void) +{ + unit_m4(Projection); + CHECKMAT(Projection3D); + state.dirty = true; +} + +void gpuLoadProjectionMatrix(const float m[4][4]) +{ + copy_m4_m4(Projection, m); + CHECKMAT(Projection3D); + state.dirty = true; +} + +void gpuLoadIdentity(void) +{ + unit_m4(ModelView); + state.dirty = true; +} + +void gpuTranslate2f(float x, float y) +{ + Mat4 m; + unit_m4(m); + m[3][0] = x; + m[3][1] = y; + gpuMultMatrix(m); +} + +void gpuTranslate2fv(const float vec[2]) +{ + gpuTranslate2f(vec[0], vec[1]); +} + +void gpuTranslate3f(float x, float y, float z) +{ +#if 1 + translate_m4(ModelView, x, y, z); + CHECKMAT(ModelView); +#else /* above works well in early testing, below is generic version */ + Mat4 m; + unit_m4(m); + m[3][0] = x; + m[3][1] = y; + m[3][2] = z; + gpuMultMatrix(m); +#endif + state.dirty = true; +} + +void gpuTranslate3fv(const float vec[3]) +{ + gpuTranslate3f(vec[0], vec[1], vec[2]); +} + +void gpuScaleUniform(float factor) +{ + Mat4 m; + scale_m4_fl(m, factor); + gpuMultMatrix(m); +} + +void gpuScale2f(float x, float y) +{ + Mat4 m = {{0.0f}}; + m[0][0] = x; + m[1][1] = y; + m[2][2] = 1.0f; + m[3][3] = 1.0f; + gpuMultMatrix(m); +} + +void gpuScale2fv(const float vec[2]) +{ + gpuScale2f(vec[0], vec[1]); +} + +void gpuScale3f(float x, float y, float z) +{ + Mat4 m = {{0.0f}}; + m[0][0] = x; + m[1][1] = y; + m[2][2] = z; + m[3][3] = 1.0f; + gpuMultMatrix(m); +} + +void gpuScale3fv(const float vec[3]) +{ + gpuScale3f(vec[0], vec[1], vec[2]); +} + +void gpuMultMatrix(const float m[4][4]) +{ + mul_m4_m4_post(ModelView, m); + CHECKMAT(ModelView); + state.dirty = true; +} + +void gpuRotate2D(float deg) +{ + /* essentially RotateAxis('Z') + * TODO: simpler math for 2D case + */ + rotate_m4(ModelView, 'Z', DEG2RADF(deg)); +} + +void gpuRotate3f(float deg, float x, float y, float z) +{ + const float axis[3] = {x, y, z}; + gpuRotate3fv(deg, axis); +} + +void gpuRotate3fv(float deg, const float axis[3]) +{ + Mat4 m; + axis_angle_to_mat4(m, axis, DEG2RADF(deg)); + gpuMultMatrix(m); +} + +void gpuRotateAxis(float deg, char axis) +{ + /* rotate_m4 works in place */ + rotate_m4(ModelView, axis, DEG2RADF(deg)); + CHECKMAT(ModelView); + state.dirty = true; +} + +static void mat4_ortho_set(float m[4][4], float left, float right, float bottom, float top, float near, float far) +{ + m[0][0] = 2.0f / (right - left); + m[1][0] = 0.0f; + m[2][0] = 0.0f; + m[3][0] = -(right + left) / (right - left); + + m[0][1] = 0.0f; + m[1][1] = 2.0f / (top - bottom); + m[2][1] = 0.0f; + m[3][1] = -(top + bottom) / (top - bottom); + + m[0][2] = 0.0f; + m[1][2] = 0.0f; + m[2][2] = -2.0f / (far - near); + m[3][2] = -(far + near) / (far - near); + + m[0][3] = 0.0f; + m[1][3] = 0.0f; + m[2][3] = 0.0f; + m[3][3] = 1.0f; + + state.dirty = true; +} + +static void mat4_frustum_set(float m[4][4], float left, float right, float bottom, float top, float near, float far) +{ + m[0][0] = 2.0f * near / (right - left); + m[1][0] = 0.0f; + m[2][0] = (right + left) / (right - left); + m[3][0] = 0.0f; + + m[0][1] = 0.0f; + m[1][1] = 2.0f * near / (top - bottom); + m[2][1] = (top + bottom) / (top - bottom); + m[3][1] = 0.0f; + + m[0][2] = 0.0f; + m[1][2] = 0.0f; + m[2][2] = -(far + near) / (far - near); + m[3][2] = -2.0f * far * near / (far - near); + + m[0][3] = 0.0f; + m[1][3] = 0.0f; + m[2][3] = -1.0f; + m[3][3] = 0.0f; + + state.dirty = true; +} + +static void mat4_look_from_origin(float m[4][4], float lookdir[3], float camup[3]) +{ +/* This function is loosely based on Mesa implementation. + * + * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008) + * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice including the dates of first publication and + * either this permission notice or a reference to + * http://oss.sgi.com/projects/FreeB/ + * shall be included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF + * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + * + * Except as contained in this notice, the name of Silicon Graphics, Inc. + * shall not be used in advertising or otherwise to promote the sale, use or + * other dealings in this Software without prior written authorization from + * Silicon Graphics, Inc. + */ + + float side[3]; + + normalize_v3(lookdir); + + cross_v3_v3v3(side, lookdir, camup); + + normalize_v3(side); + + cross_v3_v3v3(camup, side, lookdir); + + m[0][0] = side[0]; + m[1][0] = side[1]; + m[2][0] = side[2]; + m[3][0] = 0.0f; + + m[0][1] = camup[0]; + m[1][1] = camup[1]; + m[2][1] = camup[2]; + m[3][1] = 0.0f; + + m[0][2] = -lookdir[0]; + m[1][2] = -lookdir[1]; + m[2][2] = -lookdir[2]; + m[3][2] = 0.0f; + + m[0][3] = 0.0f; + m[1][3] = 0.0f; + m[2][3] = 0.0f; + m[3][3] = 1.0f; + + state.dirty = true; +} + +void gpuOrtho(float left, float right, float bottom, float top, float near, float far) +{ + mat4_ortho_set(Projection, left, right, bottom, top, near, far); + CHECKMAT(Projection); + state.dirty = true; +} + +void gpuOrtho2D(float left, float right, float bottom, float top) +{ + Mat4 m; + mat4_ortho_set(m, left, right, bottom, top, -1.0f, 1.0f); + CHECKMAT(Projection2D); + state.dirty = true; +} + +void gpuFrustum(float left, float right, float bottom, float top, float near, float far) +{ + mat4_frustum_set(Projection, left, right, bottom, top, near, far); + CHECKMAT(Projection); + state.dirty = true; +} + +void gpuPerspective(float fovy, float aspect, float near, float far) +{ + float half_height = tanf(fovy * (float)(M_PI / 360.0)) * near; + float half_width = half_height * aspect; + gpuFrustum(-half_width, +half_width, -half_height, +half_height, near, far); +} + +void gpuLookAt(float eyeX, float eyeY, float eyeZ, float centerX, float centerY, float centerZ, float upX, float upY, float upZ) +{ + Mat4 cm; + float lookdir[3]; + float camup[3] = {upX, upY, upZ}; + + lookdir[0] = centerX - eyeX; + lookdir[1] = centerY - eyeY; + lookdir[2] = centerZ - eyeZ; + + mat4_look_from_origin(cm, lookdir, camup); + + gpuMultMatrix(cm); + gpuTranslate3f(-eyeX, -eyeY, -eyeZ); +} + +void gpuProject(const float world[3], const float model[4][4], const float proj[4][4], const int view[4], float win[3]) +{ + float v[4]; + + mul_v4_m4v3(v, model, world); + mul_m4_v4(proj, v); + + if (v[3] != 0.0f) { + mul_v3_fl(v, 1.0f / v[3]); + } + + win[0] = view[0] + (view[2] * (v[0] + 1)) * 0.5f; + win[1] = view[1] + (view[3] * (v[1] + 1)) * 0.5f; + win[2] = (v[2] + 1) * 0.5f; +} + +bool gpuUnProject(const float win[3], const float model[4][4], const float proj[4][4], const int view[4], float world[3]) +{ + float pm[4][4]; + float in[4]; + float out[4]; + + mul_m4_m4m4(pm, proj, model); + + if (!invert_m4(pm)) { + zero_v3(world); + return false; + } + + in[0] = win[0]; + in[1] = win[1]; + in[2] = win[2]; + in[3] = 1; + + /* Map x and y from window coordinates */ + in[0] = (in[0] - view[0]) / view[2]; + in[1] = (in[1] - view[1]) / view[3]; + + /* Map to range -1 to +1 */ + in[0] = 2 * in[0] - 1; + in[1] = 2 * in[1] - 1; + in[2] = 2 * in[2] - 1; + + mul_v4_m4v3(out, pm, in); + + if (out[3] == 0.0f) { + copy_v3_v3(world, out); + return false; + } + + mul_v3_v3fl(world, out, 1.0f / out[3]); + return true; +} + +const float (*gpuGetModelViewMatrix(float m[4][4]))[4] +{ + if (m) { + copy_m4_m4(m, ModelView); + return m; + } + else { + return ModelView; + } +} + +const float (*gpuGetProjectionMatrix(float m[4][4]))[4] +{ + if (m) { + copy_m4_m4(m, Projection); + return m; + } + else { + return Projection; + } +} + +const float (*gpuGetModelViewProjectionMatrix(float m[4][4]))[4] +{ + if (m == NULL) { + static Mat4 temp; + m = temp; + } + + mul_m4_m4m4(m, Projection, ModelView); + return m; +} + +const float (*gpuGetNormalMatrix(float m[3][3]))[3] +{ + if (m == NULL) { + static Mat3 temp3; + m = temp3; + } + + copy_m3_m4(m, (const float (*)[4])gpuGetModelViewMatrix(NULL)); + + invert_m3(m); + transpose_m3(m); + + return m; +} + +const float (*gpuGetNormalMatrixInverse(float m[3][3]))[3] +{ + if (m == NULL) { + static Mat3 temp3; + m = temp3; + } + + gpuGetNormalMatrix(m); + invert_m3(m); + + return m; +} + +void gpuBindMatrices(const Gwn_ShaderInterface *shaderface) +{ + /* set uniform values to matrix stack values + * call this before a draw call if desired matrices are dirty + * call glUseProgram before this, as glUniform expects program to be bound + */ + + const Gwn_ShaderInput *MV = GWN_shaderinterface_uniform_builtin(shaderface, GWN_UNIFORM_MODELVIEW); + const Gwn_ShaderInput *P = GWN_shaderinterface_uniform_builtin(shaderface, GWN_UNIFORM_PROJECTION); + const Gwn_ShaderInput *MVP = GWN_shaderinterface_uniform_builtin(shaderface, GWN_UNIFORM_MVP); + + const Gwn_ShaderInput *N = GWN_shaderinterface_uniform_builtin(shaderface, GWN_UNIFORM_NORMAL); + const Gwn_ShaderInput *MV_inv = GWN_shaderinterface_uniform_builtin(shaderface, GWN_UNIFORM_MODELVIEW_INV); + const Gwn_ShaderInput *P_inv = GWN_shaderinterface_uniform_builtin(shaderface, GWN_UNIFORM_PROJECTION_INV); + + if (MV) { +#if DEBUG_MATRIX_BIND + puts("setting MV matrix"); +#endif + + glUniformMatrix4fv(MV->location, 1, GL_FALSE, (const float *)gpuGetModelViewMatrix(NULL)); + } + + if (P) { +#if DEBUG_MATRIX_BIND + puts("setting P matrix"); +#endif + + glUniformMatrix4fv(P->location, 1, GL_FALSE, (const float *)gpuGetProjectionMatrix(NULL)); + } + + if (MVP) { +#if DEBUG_MATRIX_BIND + puts("setting MVP matrix"); +#endif + + glUniformMatrix4fv(MVP->location, 1, GL_FALSE, (const float *)gpuGetModelViewProjectionMatrix(NULL)); + } + + if (N) { +#if DEBUG_MATRIX_BIND + puts("setting normal matrix"); +#endif + + glUniformMatrix3fv(N->location, 1, GL_FALSE, (const float *)gpuGetNormalMatrix(NULL)); + } + + if (MV_inv) { + Mat4 m; + gpuGetModelViewMatrix(m); + invert_m4(m); + glUniformMatrix4fv(MV_inv->location, 1, GL_FALSE, (const float *)m); + } + + if (P_inv) { + Mat4 m; + gpuGetProjectionMatrix(m); + invert_m4(m); + glUniformMatrix4fv(P_inv->location, 1, GL_FALSE, (const float *)m); + } + + state.dirty = false; +} + +bool gpuMatricesDirty(void) +{ + return state.dirty; +} + + +/* -------------------------------------------------------------------- */ + +/** \name Python API Helpers + * \{ */ +BLI_STATIC_ASSERT(GPU_PY_MATRIX_STACK_LEN + 1 == MATRIX_STACK_DEPTH, "define mismatch"); + +/* Return int since caller is may subtract. */ + +int GPU_matrix_stack_level_get_model_view(void) +{ + return (int)state.model_view_stack.top; +} + +int GPU_matrix_stack_level_get_projection(void) +{ + return (int)state.projection_stack.top; +} + +/** \} */ |